| /* |
| * SMP Support |
| * |
| * Copyright (C) 1999 VA Linux Systems |
| * Copyright (C) 1999 Walt Drummond <drummond@valinux.com> |
| * Copyright (C) 2001-2002 Hewlett-Packard Co |
| * David Mosberger-Tang <davidm@hpl.hp.com> |
| */ |
| #ifndef _ASM_IA64_SMP_H |
| #define _ASM_IA64_SMP_H |
| |
| #include <linux/config.h> |
| |
| #ifdef CONFIG_SMP |
| |
| #include <linux/init.h> |
| #include <linux/threads.h> |
| #include <linux/kernel.h> |
| |
| #include <asm/io.h> |
| #include <asm/param.h> |
| #include <asm/processor.h> |
| #include <asm/ptrace.h> |
| |
| #define XTP_OFFSET 0x1e0008 |
| |
| #define SMP_IRQ_REDIRECTION (1 << 0) |
| #define SMP_IPI_REDIRECTION (1 << 1) |
| |
| #define smp_processor_id() (current_thread_info()->cpu) |
| |
| extern struct smp_boot_data { |
| int cpu_count; |
| int cpu_phys_id[NR_CPUS]; |
| } smp_boot_data __initdata; |
| |
| extern char no_int_routing __initdata; |
| |
| extern volatile unsigned long cpu_online_map; |
| extern unsigned long ipi_base_addr; |
| extern unsigned char smp_int_redirect; |
| extern int smp_num_cpus; |
| |
| extern volatile int ia64_cpu_to_sapicid[]; |
| #define cpu_physical_id(i) ia64_cpu_to_sapicid[i] |
| #define cpu_number_map(i) (i) |
| #define cpu_logical_map(i) (i) |
| |
| extern unsigned long ap_wakeup_vector; |
| |
| /* |
| * Function to map hard smp processor id to logical id. Slow, so |
| * don't use this in performance-critical code. |
| */ |
| static inline int |
| cpu_logical_id (int cpuid) |
| { |
| int i; |
| |
| for (i = 0; i < smp_num_cpus; ++i) |
| if (cpu_physical_id(i) == (__u32) cpuid) |
| break; |
| return i; |
| } |
| |
| /* |
| * XTP control functions: |
| * min_xtp : route all interrupts to this CPU |
| * normal_xtp: nominal XTP value |
| * max_xtp : never deliver interrupts to this CPU. |
| */ |
| |
| static inline void |
| min_xtp (void) |
| { |
| if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
| writeb(0x00, ipi_base_addr | XTP_OFFSET); /* XTP to min */ |
| } |
| |
| static inline void |
| normal_xtp (void) |
| { |
| if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
| writeb(0x08, ipi_base_addr | XTP_OFFSET); /* XTP normal */ |
| } |
| |
| static inline void |
| max_xtp (void) |
| { |
| if (smp_int_redirect & SMP_IRQ_REDIRECTION) |
| writeb(0x0f, ipi_base_addr | XTP_OFFSET); /* Set XTP to max */ |
| } |
| |
| static inline unsigned int |
| hard_smp_processor_id (void) |
| { |
| union { |
| struct { |
| unsigned long reserved : 16; |
| unsigned long eid : 8; |
| unsigned long id : 8; |
| unsigned long ignored : 32; |
| } f; |
| unsigned long bits; |
| } lid; |
| |
| lid.bits = ia64_get_lid(); |
| return lid.f.id << 8 | lid.f.eid; |
| } |
| |
| #define NO_PROC_ID 0xffffffff /* no processor magic marker */ |
| |
| extern void __init init_smp_config (void); |
| extern void smp_do_timer (struct pt_regs *regs); |
| |
| extern int smp_call_function_single (int cpuid, void (*func) (void *info), void *info, |
| int retry, int wait); |
| extern void smp_send_reschedule (int cpu); |
| extern void smp_send_reschedule_all (void); |
| |
| |
| #endif /* CONFIG_SMP */ |
| #endif /* _ASM_IA64_SMP_H */ |